8-6
Saving a Change to Holding Register
(Enter Command)
The Write to Holding Register (06 hex) or Write to Consecutive Holding Registers (10 hex or 17 hex)
function is used to enable new register data. However, the new data is not stored in the EEPROM
memory of the inverter and is restored to the previous value when the inverter power supply is shut off.
To store a change to holding registers in the inverter’s EEPROM memory, issue the Enter command
according to the following procedure. In addition, after changing a control parameter, you need to re-
calculate the motor parameters. In this case, also use the Enter command to execute recalculation.
8-6-1
How to Issue Enter Command
Use the Write to Holding Register (06 hex) command to write data to the holding register for the Enter
command (0900 hex). Below are the values to be written to the holding register (0900 hex).
Set value Description
0000 Disable
0001 Set values are stored in the EEPROM memory. This register auto-
matically returns to 0.
Example) Issuing Enter Command (Storing Set Value) for Inverter
with Slave Address 8
Query
No. Field name Example (hex) Remarks
1
Slave address
*1
08
2 Function code 06
3
Register address (MSB)
*2
08
(Register address) = (Register number) − 1
4
Register address (LSB)
*2
FF
5 Written data (MSB) 00
6 Written data (LSB) 01
7 CRC-16 (MSB) 7A
8 CRC-16 (LSB) C3
*1. For a broadcast, no response will be sent back.
*2. Note that the register address is 08FF hex, which is 1 less than the register number 0900 hex.
Response
No. Field name Example (hex)
1 Slave address 08
2 Function code 06
3 Register address (MSB)Response on page 8-21 08
4 Register address (LSB)Response on page 8-
21 FF
5 Written data (MSB) 00
6 Written data (LSB) 01
8 Communications Functions
8-21
M1 Series Standard Type User's Manual (I669)
8-6 Saving a Change to Holding Register (Enter Command)
8
8-6-1 How to Issue Enter Command
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